people = {'first_name' : 'ming' , 'last_name' : 'xiao' , 'age' : '18' , 'city' : 'chengdu'}
print("first_name:"+ people['first_name'].title())
print("last_name:"+people['last_name'].title())
print("age:"+people['age'])
print("city:"+people['city'].title())